Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa34ab290613370e…

MALICIOUS

PDF

62.2 KB Created: 2021-09-29 08:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 562953dc510cc3b6ea8fb00e90d60542 SHA-1: 49561db1d5afaf6293a9a58aa1b7cd61a916953b SHA-256: fa34ab290613370e9f37c6ee814c643b3e81227387603242e7abd151f1cd9677
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of URLs pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or distributing further malware. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5277

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613985d3cc83f---41903011904.pdf In PDF document text
    • http://cartopack.be/Images/file/nalapijetemokezukeladikar.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/romixuzemos.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1630628507.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/44086865593.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/jedob.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/kadene.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/43829825803.pdfIn PDF document text
    • http://iltorg.ru/upload/file/35485761010.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/51ot4i555q93j9i1hvmf22eij5/tidokamagula.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/31091743284.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/29588059980.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613602b781f82---pekitimivifetik.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/pufazoxu.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/nagodizonobeni.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631706650_b5ed5bbd63.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/wofanofokutumadozabufivid.pdfIn PDF document text
    • http://elpijisystem.com/file/17330273396.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b25ea1814e---mason.pdfIn PDF document text
    • http://chromavials.com/d/files/petadida.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/17130290933.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202109180619361966.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/72435723179.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/kevasivazafo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=location+spoof+pokemon+goPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CB 10728 bytes
SHA-256: 7fbbea26fb18de5b6a2a3ab92a19d3f6f8cdb0cf7059827d8dd838edd562445c
font_01_sfnt_off0000c979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC979 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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